Temporal and spatial dynamics analysis of vegetation index in Xinjiang from 2000 to 2015

doi:10.14088/j.cnki.issn0439-8114.2022.10.008

Abstract

Abstract: Based on the MODIS NDVI data and the meteorological data in the same period from 2000 to 2015, the spatial and temporal variation of NDVI was analyzed in Xinjiang by using trend analysis, Mann-Kendall test and correlation analysis, and the response of NDVI was explored to meteorological factors. The results showed that NDVI of Xinjiang was rising from 2000 to 2015, and the annual average NDVI had no significant correlation with the mean annual temperature and mean annual precipitation. There was a positive correlation between NDVI and mean temperature in spring, and between NDVI and precipitation in summer, but there was no significant correlation between NDVI and temperature and precipitation in autumn. Since NDVI had a lag response to precipitation, there was a significant positive correlation between spring NDVI and winter precipitation, and between autumn NDVI and summer precipitation. Relatively speaking, the effect of mean temperature in the same season on NDVI was higher than that of the previous season, indicating that there was no hysteresis in the response of NDVI to temperature.

Key words: vegetation index, climatic factors, correlation analysis, hysteresis

CLC Number:

Q948

SU Hong-jun, XU Zhong-lin. Temporal and spatial dynamics analysis of vegetation index in Xinjiang from 2000 to 2015[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(10): 48-55.

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